Guerrilla Gardening

Anyone tried this? I had heard of it from a few years back and thought it was a great idea. What you do is mix some compost & clay soil with wild flower seeds -add moisture and roll some plum sized balls from the mix - Take these out with you in the car & select an eye-sore spare ground or ugly roundabout. If carrying a passenger -ask them to roll down the window and launch your balls (without danger of striking people or animals) and monitor your chosen site to see if any new flowers have germinated. That's it !